The largest toe (usually) on each human foot (i.e. the toe closest to the other foot when the feet are flat on the ground, side by side, and the legs not crossed) or on a foot of certain other animals.
The long bone in the forearm, on the side of the thumb.
The lighter bone (or fused portion of bone) in the forelimb of an animal.
A line segment between any point of a circle or sphere and its center.
One of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.
Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
The length of this line segment.